/*
 * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 *
 */

package javax.xml.transform;

/**
 * Thrown when a problem with configuration with the Transformer Factories
 * exists. This error will typically be thrown when the class of a
 * transformation factory specified in the system properties cannot be found
 * or instantiated.
 */
public class TransformerFactoryConfigurationError extends Error {

  private static final long serialVersionUID = -6527718720676281516L;

  /**
   * <code>Exception</code> for the
   * <code>TransformerFactoryConfigurationError</code>.
   */
  private Exception exception;

  /**
   * Create a new <code>TransformerFactoryConfigurationError</code> with no
   * detail mesage.
   */
  public TransformerFactoryConfigurationError() {

    super();

    this.exception = null;
  }

  /**
   * Create a new <code>TransformerFactoryConfigurationError</code> with
   * the <code>String</code> specified as an error message.
   *
   * @param msg The error message for the exception.
   */
  public TransformerFactoryConfigurationError(String msg) {

    super(msg);

    this.exception = null;
  }

  /**
   * Create a new <code>TransformerFactoryConfigurationError</code> with a
   * given <code>Exception</code> base cause of the error.
   *
   * @param e The exception to be encapsulated in a TransformerFactoryConfigurationError.
   */
  public TransformerFactoryConfigurationError(Exception e) {

    super(e.toString());

    this.exception = e;
  }

  /**
   * Create a new <code>TransformerFactoryConfigurationError</code> with the
   * given <code>Exception</code> base cause and detail message.
   *
   * @param e The exception to be encapsulated in a TransformerFactoryConfigurationError
   * @param msg The detail message.
   */
  public TransformerFactoryConfigurationError(Exception e, String msg) {

    super(msg);

    this.exception = e;
  }

  /**
   * Return the message (if any) for this error . If there is no
   * message for the exception and there is an encapsulated
   * exception then the message of that exception will be returned.
   *
   * @return The error message.
   */
  public String getMessage() {

    String message = super.getMessage();

    if ((message == null) && (exception != null)) {
      return exception.getMessage();
    }

    return message;
  }

  /**
   * Return the actual exception (if any) that caused this exception to
   * be raised.
   *
   * @return The encapsulated exception, or null if there is none.
   */
  public Exception getException() {
    return exception;
  }

  /**
   * use the exception chaining mechanism of JDK1.4
   */
  @Override
  public Throwable getCause() {
    return exception;
  }
}
